Plz dont route it via PNVL/KYN/BSR . Route it via UDN - NDB - BSL - WR - BPQ - WL - BZA , because there are many trains from CSMT via KYN - PUNE - SUR . And if you route it via This route that I suggested would be usefull for Gudur and Nellore passengers , since they dont have any trains to Mumbai.